FDA Releases Draft Guidance on Defining Durations of Use for Certain Medically Important Antimicrobial Drugs for Food Animals September 25, 2023 Today, the U.S. Food and Drug Administration released a draft guidance for industry (GFI) to provide recommendations on how animal drug sponsors may voluntarily establish a defined duration of use for certain approved medically important antimicrobial read more Food and Drug Administration (FDA): Draft Guidance on Defining Durations of Use for Certain Medically Important Antimicrobial Drugs for Food Animals